Validation of a SNP-based non-invasive prenatal test to detect the fetal 22q11.2 deletion in maternal plasma samples

Non-invasive prenatal testing (NIPT) for aneuploidy using cell-free DNA in maternal plasma has been widely adopted. Recently, NIPT coverage has expanded to detect subchromosomal abnormalities including the 22q11.2 deletion. Validation of a SNP-based NIPT for detection of 22q11.2 deletions demonstrat...

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Veröffentlicht in:PloS one 2018-02, Vol.13 (2), p.e0193476-e0193476
Hauptverfasser: Ravi, Harini, McNeill, Gabriel, Goel, Shruti, Meltzer, Steven D, Hunkapiller, Nathan, Ryan, Allison, Levy, Brynn, Demko, Zachary P
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McNeill, Gabriel
Goel, Shruti
Meltzer, Steven D
Hunkapiller, Nathan
Ryan, Allison
Levy, Brynn
Demko, Zachary P
description Non-invasive prenatal testing (NIPT) for aneuploidy using cell-free DNA in maternal plasma has been widely adopted. Recently, NIPT coverage has expanded to detect subchromosomal abnormalities including the 22q11.2 deletion. Validation of a SNP-based NIPT for detection of 22q11.2 deletions demonstrating a high sensitivity (97.8%) and specificity (99.75%) has been reported. We sought to further demonstrate the performance of a revised version of the test in a larger set of pregnancy plasma samples. Blood samples from pregnant women (10 with 22q11.2-deletion‒affected fetuses and 390 negative controls) were successfully analyzed using a revised SNP-based NIPT for the 22q11.2 deletion. The sensitivity and specificity of the assay were measured. Sensitivity of the assay was 90% (9/10), and specificity of the assay was 99.74% (389/390), with a corresponding false positive-rate of 0.26%. The data presented in this study add to the growing body of evidence demonstrating the ability of the SNP-based NIPT to detect 22q11.2 deletions with high sensitivity and specificity.
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subjects Abnormalities
Adult
Amniocentesis
Analysis
Aneuploidy
Assaying
Biology and Life Sciences
Children & youth
Chromosome Deletion
Chromosomes
Chromosomes, Human, Pair 22
Clonal deletion
Congenital diseases
Deoxyribonucleic acid
DNA
Female
Fetuses
Gene deletion
Genetic aspects
Genetic Testing - methods
Gynecology
Humans
Intermetallic compounds
Laboratories
Medicine and Health Sciences
Mothers
Nickel base alloys
Nickel compounds
Obstetrics
Physiological aspects
Plasma - metabolism
Platinum compounds
Polymorphism, Single Nucleotide
Pregnancy
Prenatal diagnosis
Prenatal Diagnosis - methods
Research and Analysis Methods
Sampling methods
Sensitivity
Single nucleotide polymorphisms
Single-nucleotide polymorphism
Women
title Validation of a SNP-based non-invasive prenatal test to detect the fetal 22q11.2 deletion in maternal plasma samples
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